Bump version to 1.1.6

flake.lock

@@ -1,18 +1,13 @@
 {
   "nodes": {
     "debBundler": {
-      "inputs": {
+      "flake": false,
-        "home-manager": "home-manager",
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
       "locked": {
-        "lastModified": 1699154900,
+        "lastModified": 1705083181,
-        "narHash": "sha256-y+PK9ToYcAyY86EoM7Iam7gC++rCuAGndlnPTEzd3EA=",
+        "narHash": "sha256-o1zolChrQk7UpMmFLjymjQWuoDIL1XStV56kuOprMDQ=",
         "owner": "illustris",
         "repo": "flake",
-        "rev": "a56221a54571b0e4326af29cf75b4cec081b8de7",
+        "rev": "6a9df656834b5111f7ffb0b1f6d97a0d8700de58",
         "type": "github"
       },
       "original": {
@@ -21,34 +16,13 @@
         "type": "github"
       }
     },
-    "home-manager": {
-      "inputs": {
-        "nixpkgs": [
-          "debBundler",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1699025595,
-        "narHash": "sha256-e+o4PoSu2Z6Ww8y/AVUmMU200rNZoRK+p2opQ7Db8Rg=",
-        "owner": "nix-community",
-        "repo": "home-manager",
-        "rev": "8765d4e38aa0be53cdeee26f7386173e6c65618d",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-community",
-        "repo": "home-manager",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1699099776,
+        "lastModified": 1704722960,
-        "narHash": "sha256-X09iKJ27mGsGambGfkKzqvw5esP1L/Rf8H3u3fCqIiU=",
+        "narHash": "sha256-mKGJ3sPsT6//s+Knglai5YflJUF2DGj7Ai6Ynopz0kI=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "85f1ba3e51676fa8cc604a3d863d729026a6b8eb",
+        "rev": "317484b1ead87b9c1b8ac5261a8d2dd748a0492d",
         "type": "github"
       },
       "original": {

flake.nix

@@ -5,7 +5,7 @@ rec {
 		nixpkgs.url = github:nixos/nixpkgs/nixos-unstable;
 		debBundler = {
 			url = github:illustris/flake;
-			inputs.nixpkgs.follows = "nixpkgs";
+			flake = false;
 		};
 	};
 
@@ -14,7 +14,7 @@ rec {
 		packages.x86_64-linux = with nixpkgs.legacyPackages.x86_64-linux; rec {
 			pvemon = python3Packages.buildPythonApplication {
 				pname = "pvemon";
-				version = "1.1.1";
+				version = "1.1.6";
 				src = ./src;
 				propagatedBuildInputs = with python3Packages; [
 					pexpect
@@ -28,7 +28,7 @@ rec {
 				};
 			};
 			default = pvemon;
-			deb = debBundler.bundlers.x86_64-linux.deb default;
+			deb = (import "${debBundler}/bundlers/deb" { inherit pkgs; }) default;
 			updateRelease = writeScriptBin "update-release" (builtins.readFile ./utils/update-release.sh);
 		};
 

src/pvecommon/__init__.py

@@ -30,11 +30,20 @@ def ttl_cache_with_randomness(max_ttl, randomness_factor):
             result = func(*args, **kwargs)
             cache[key] = (result, time.time())
             return result
+
+        def invalidate_cache(*args, **kwargs):
+            key = str(args) + str(kwargs)
+            if key in cache:
+                del cache[key]
+
+        # Attach the invalidation function to the wrapper
+        wrapper.invalidate_cache = invalidate_cache
+
         return wrapper
     return decorator
 
 @ttl_cache_with_randomness(qm_max_ttl, qm_rand)
-def qm_term_cmd(vm_id, cmd, timeout=global_qm_timeout):
+def qm_term_cmd(vm_id, cmd, timeout=global_qm_timeout): # TODO: ignore cmd timeout in cache key
     global deferred_closing
     child = pexpect.spawn(f'qm monitor {vm_id}')
     try:

src/pvemon/__init__.py

@@ -51,6 +51,21 @@ info_settings = [
 
 flag_to_label_value = lambda args, match: next((args[i+1] for i, x in enumerate(args[:-1]) if x == match), "unknown").split(",")[0]
 
+def parse_mem(cmdline):
+    ret = flag_to_label_value(cmdline, "-m")
+    # lazy way to detect NUMA
+    # the token after -m might look something like 'size=1024,slots=255,maxmem=4194304M'
+    if ret.isnumeric():
+        return int(ret)*1024
+
+    # probably using NUMA
+    ret = 0
+    for arg in cmdline:
+        if "memory-backend-ram" in arg:
+            assert(arg[-1]=='M')
+            ret += 1024*int(arg.split("=")[-1][:-1])
+    return ret
+
 def create_or_get_gauge(metric_name, labels, dynamic_gauges, gauge_lock):
     with gauge_lock:
         if metric_name not in dynamic_gauges:
@@ -132,11 +147,17 @@ def collect_kvm_metrics():
     for proc in psutil.process_iter(['pid', 'name', 'exe', 'cmdline', 'cpu_percent', 'memory_percent', 'num_threads']):
         try:
             if proc.info['exe'] == '/usr/bin/qemu-system-x86_64':
+                vmid = flag_to_label_value(proc.info['cmdline'], "-id")
+                # Check if VM definition exists. If it is missing, qm commands will fail.
+                # VM configs are typically missing when a VM is migrating in.
+                # The config file is moved after the drives and memory are synced.
+                if not os.path.exists(f'/etc/pve/qemu-server/{vmid}.conf'):
+                    continue
                 procs.append(
                     (
                         proc,
                         proc.info['cmdline'],
-                        flag_to_label_value(proc.info['cmdline'], "-id")
+                        vmid
                     )
                 )
         except (psutil.NoSuchProcess, psutil.AccessDenied, psutil.ZombieProcess):
@@ -151,7 +172,7 @@ def collect_kvm_metrics():
 
         d = {
             "kvm_vcores": flag_to_label_value(cmdline,"-smp"),
-            "kvm_maxmem": int(flag_to_label_value(cmdline,"-m"))*1024,
+            "kvm_maxmem": parse_mem(cmdline),
             "kvm_memory_percent": proc.info['memory_percent'],
             "kvm_threads": proc.info['num_threads'],
         }

src/qmblock/__init__.py

@@ -5,6 +5,8 @@ import json
 
 import pvecommon
 
+extract_disk_info_max_retries = 1
+
 def get_device(disk_path):
     try:
         return os.readlink(disk_path).split('/')[-1]
@@ -26,7 +28,7 @@ def handle_json_path(path):
         raise ValueError('No host_device driver found or filename is missing')
     return filename
 
-def extract_disk_info_from_monitor(vm_id):
+def extract_disk_info_from_monitor(vm_id, retries = 0):
     raw_output = pvecommon.qm_term_cmd(vm_id, 'info block')
     disks_map = {}
     disks = [x.strip() for x in raw_output.split("drive-")[1:]]
@@ -73,6 +75,11 @@ def extract_disk_info_from_monitor(vm_id):
             disks_map[disk_name]["vg_name"] = vg_name
             disks_map[disk_name]["vol_name"] = vol_name
             disks_map[disk_name]["device"] = get_device(disk_path)
+        # At this point, if disks_map[disk_name]["device"] exists and is None, the cache might be stale
+        # Flush the cache for this VMID and try again
+        if "device" in disks_map[disk_name] and disks_map[disk_name]["device"] == None and retries < extract_disk_info_max_retries:
+            pvecommon.qm_term_cmd.invalidate_cache(vm_id, 'info block')
+            return extract_disk_info_from_monitor(vm_id, retries+1)
         for line in data[1:-1]:
             if "Attached to" in line:
                 attached_to = line.split(":")[-1].strip()

src/setup.py

@@ -2,7 +2,7 @@ from setuptools import setup, find_packages
 
 setup(
     name='pvemon',
-    version = "1.1.1",
+    version = "1.1.6",
     packages=find_packages(),
     entry_points={
         'console_scripts': [